Upgrade insecure requests
Widely available since 2020-10-30
The Upgrade-Insecure-Requests HTTP request header tells the server that the response should redirect to a secure (HTTPS) resource.
Learning resources on MDN
Browser support
- Chrome 44 Released on 2015-07-21
- Chrome Android 44 Released on 2015-07-29
- Edge 17 Released on 2018-04-30
- Firefox 48 Released on 2016-08-02
- Firefox for Android 48 Released on 2016-08-02
- Safari 10.1 Released on 2017-03-27
- Safari on iOS 10.3 Released on 2017-03-27